// CashDispenser.java
// Represents the cash dispenser of the ATM

public class CashDispenser {
	// the default initial number of bills in the cash dispenser
	private final static int INITIAL_COUNT = 500;
	private int count; // number of $20 bills remaining

	// no-argument CashDispenser constructor initializes count to default
	public CashDispenser() {
		count = INITIAL_COUNT; // set count attribute to default
	} // end CashDispenser constructor

	// simulates dispensing of specified amount of cash
	public void dispenseCash(int amount) {
		int billsRequired = amount / 20; // number of $20 bills required
		count -= billsRequired; // update the count of bills
	} // end method dispenseCash

	// indicates whether cash dispenser can dispense desired amount
	public boolean isSufficientCashAvailable(int amount) {
		int billsRequired = amount / 20; // number of $20 bills required

		if (count >= billsRequired)
			return true; // enough bills available
		else
			return false; // not enough bills available
	} // end method isSufficientCashAvailable
} // end class CashDispenser

/**************************************************************************
 * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and * Pearson Education,
 * Inc. All Rights Reserved. * * DISCLAIMER: The authors and publisher of this
 * book have used their * best efforts in preparing the book. These efforts
 * include the * development, research, and testing of the theories and programs
 * * to determine their effectiveness. The authors and publisher make * no
 * warranty of any kind, expressed or implied, with regard to these * programs
 * or to the documentation contained in these books. The authors * and publisher
 * shall not be liable in any event for incidental or * consequential damages in
 * connection with, or arising out of, the * furnishing, performance, or use of
 * these programs. *
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